Coupling of dynamos and motors



(No Model.)

0. P. LOOMIS.

COUPLING 0F DYNAMOSAND MOTORS.

Patented Jan. 22, 1889.

f C) (F (J (D 6) Q v r @pm lggumnm 49/ arm-12 UNITED STATES PATENT OFFICE.

OSBORN P. LOOMIS, OF SOMERVILLE, MASSACIlUSE'l"lS, ASSIGXOR TO THE LOOMIS ELECTRIC MANI FACTURIXG COMPANY, OF XE\V YORK.

COUPLING OF DYNAMOS AND MOTORS.

SPECIFICATION forming part of Letters Patent No. 396,581, dated January 22, 1889.

Application filed April 19, 1888. Serial No. 271,215. (No mudeld T aZZ whom it may concern: made up of two binding-posts, l0 and 11, Be it known that I, OSBORN P. LOOMIS, a mounted upon an insulating-base, 12. From citizen of the United States, residing at Somthese binding-posts extend metalpieces 13 11, erville, in the county of Middlesex and State the latter of which is bent so as to lie over 55 of Massachusetts, have invented certain new the piece 13, but does not touch the same. and useful Improvements in Coupling Dyna- Upon these pieces 13 and 11, respectively, are mos and Switches for the Same, of which the pivoted switch-levers 15 10. Arranged within following is such a full, clear, and exact dethe path of the forward ends of the switchscription as will enable any one skilled in the levers 15 are two sets of spring-terminals 60 IO art to which it appertains to make and use connected tobinding-posts 17 18, respectively, the same, reference being had to the accomcarried by the insulating baseplate 12. The panyingdrawings, forming part of this speciswitch-lever can be operated to connect tication. the binding-post 10 with the binding-post 18,

My improvements relate to coupling dynaas represented in the drawings, or can be op- 6 5 r5 mos in multiple arc to supply a working-cirerated so as to connect the binding-post 1O cuit, and relate more particularly to the coupwith the binding-post 17. So, too, the switchling of compound-wound dynamos. lever 10 can be operated so as to connect the The object of the invent-ion is to couple binding-post 11 with the binding-post 17, as

such dynamos so that they will not interfere shown in the drawings, or to connect said 70 20 with one another. binding-post 11 with the binding-post 18.

The invention has for a further object to I connect the series coils of the dynamo 1 produce a convenient apparatus for accomwith the binding-post 11 and one of the complishing the above without extinction of the mutator-brushes thereof with the bindinglights while both dynamos are running. post 18. In the same manner I connect the 7 5 The invention consists in a new and useful series coils of the dynamo 2 with the bindingway of connecting the coils and circuits of post 10 and the terminal of one of the comthe dynamos together;and it consists, also, in mutator-brnshes of the dynamo 2 with the a novel form of switch for making the aforebinding-post 17. The other ends of each sesaid connections. ries coil I connect with the working-circuit 6. 8o

0 I will now set forth my invention in detail The remaining terminals of each dynamo I by referring to the accompanying drawings, connect to the circuit 6 at the point 7. The forming a part of this specification. shunt-coils 1 of each dynamo are also con- Figure I is a diagrammatic view of two nected to the other dynamo the same as the dynamos connected together in accordance series coils. 'When the switch-levers are in 8 with my invention. Fig. II is a plan of my the position represented in the drawings, a switch for controlling the connections. Figs. terminal of the dynamo 1 is connected with III and IV are sections of the switch on the the series and shunt coils of the dynamo 2, lines III III and IV IV, respectively, of and, vice versa, the series and shunt coils of Fig. II. the dynamo 2 are connected with a terminal 0 40 The same figures of reference indicate the of the dynamo 1, so that ii the electro-motive same parts in the several views. force of the dynamo 1 should fall this would I have designated by 1 one of the dynamos, affect the dynamo 2 in the same way, because and by 2 the other dynamo. said dynamo 2 derives its supply from dynamo 3 indicates the series coils of each dynamo, 1. In the samemanner, if the electro-motive 95 and 4 the shunt-coils. force of the dynamo 1 should rise, the elec- 5 designates the armature of each dynamo. tro-motive force of dynamo 2 would rise for 6 represents the working-circuit, to which the same reason. Thus it is seen that both the dynamos are connected in multiple are at dynamos would equal each otherin all condithe points '7 and 8. tions. It does not matter which dynamo rises 100 9 is a switch, which I place in the circuit or falls in electro-motive force, the other will between the two dynamos. This switch is be affected in equal proportion.

I have represented in the diagram by arrows the path of the currents, and shown the circuits so clearly that the above will be understood without further explanation.

In another application, Serial No. 249,578,

filed September 13, 1887, I have set forth, briefly, the difficulties that arise in coupling two dynamos together in multiple arc, explained how the one will overpower the other, and set forth means for overcoming the objections noted therein. In the present application the same object is attained in another way. Should the switch-levers 15 16 be operated and thrown in a reverse position to that shown in the drawings, so as to connect the binding-post with the binding-post 17 and the binding-post 11 with the binding-post 18, the dynamos would be rendered independent and could be run separately.

The means of regulating one dynamo by the other described above is extremely simple and efiective in operation.

I do not wish to confine myself to the exact form of switch described, as any other switching mechanism could be used to make the connections.

Having now fully set forth my invention, what I desire to claim, and secure by Letters Patent of the United States, as my invention 1s 1. The combination of the dynamos 1 and 2, supplying a working-circuit in multiple arc and having shunt and series coils, the terminal 11, connected to one end of the shunt and series coils of the dynamo 1, the terminal 10, connected to one end of the shunt and series coils of the dynamo 2, switch-levers and 16, pivoted one above the other to metal pieces 13 and 11 in electrical connection with said terminals, respectively, and terminals 17 and 18, arranged within the path of said switchlevers and connected to one of the commutator-brushes of the dynamos 2 and 1, respectively, substantially as described, whereby the shunt and series coils of each dynamo may be connected to a terminal of the other dynamo for the purpose described, or may be disconnected therefrom and the dynamos worked independently.

2. The combination of the binding-posts 1O 11, the metal pieces 13 let, arranged as described, the switch-levers 15 16, pivoted. one above the other to said metal pieces, respectix'ely, and two sets of spring-terminals connccted to the binding-posts 17 18, substantially as described.

In testimony whereof I have hereunto set my hand and affixed my seal, this 16th day of April, 1888, in the presence of the two subscribing witnesses.

OSBORN P. LOOMIS.

\Vitnesses:

N. M. ENGLEY, GEO. W. DICKERMAN. 

